Problem with code line on _header.php, need advice.

Hi guys,

I tried to add these 2 lines (one at a time)  to _header.php but it didn't work and it didn't create the thumbnail for my site. When i'm posting my url on FB I get only the link with no thumbnail.

<link rel="image_src" href="http://thetaline.org/thetaline.png"/>
<meta property="og:image" content="http://thetaline.org/thetaline.png

I tried to look for answers here and on the web but those 2 lines repeat at almost every article I found.

Can someone direct me or give me an advice on why wouldn't it work?

Thank you.

you try to put in your _header.html right..

[edit]

have you tried sharing this link, http://thetaline.org/index.php

it's not a fix, loads all your slideshow images.

Perhaps make a slideshow image to use as a fb icon as well

Yea as newton said. You mean _header.html right?

And your second line as you posted it here appears to be incomplete.

And of course the obvious, or should be obvious question. Did you clear your dolphin cache?

ohh god this is embarrassing. Yes its _header.html  sorry about that.

Newton you're right, it works now. So if I want to have a logo image appear as well, to what file should I upload it to?

 Seems to be working without either of these code lines. Strange.

as for cache, I always delete it from admin panel and click on all options all/template/js-css/pages & blocks etc.

Ok I got it!! it all works fine.

Thank you guys.